Panic-bolt.



J, M. MARTY.

PANIC BOLT.

APPLICATION FILED DEG.14, 1012.

1,067,997, Patented July 22,1913.

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(luau/W41 J. M. MARTY.

PANIC BOLT.

APPLICATION FILED 13110.14, 1912 BET 2.

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' panic bolts or TENT FlQtJE.

JOHN M. MARTY, OF CLEVELAND, OHIO.

PANIC-BOLT.

To all whom it may concern:

Be it known that 1, JOHN M. lVlARTY, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Panic-Bolts, of which the following is a specification.

My invention relates to improvements in locking mechanism for emergency exit-doors, the primary object of the invention being to provide a generally improved emergency fire or panic eXit bolt, the present embodiment being particularly designed and adapted for use as a panic bolt in securing the doors of public school buildings in accordance with the laws now in force in this respect.

In accordance with the above, the .invention has for its object the provision of a panic door bolt or locking mechanism which may be readily and expeditiously operated from the inside only to quickly release the door, and when so released, cannot be returned to locked position without the use of a key to be kept in the possession of the janitor or other authorized attendant.

With the above mentioned and other ends in view, the invention consists in the novel construction, arrangement, and combination of parts, hereinafter described, illustrated in one of its embodiments in the accompanying drawings, and particularly pointed out in the appended claim.

Referring to the drawings, forming a part of this specification, Figure 1, is a view of the improved panic bolt in its locked position, as applied to the inner side of one of the doors, such as are commonly employed in school buildings where one of the doors is locked and only used in an ei'nergency, and the other is used continuously. Fig. 2, is a perspective view of the lock, proper, with the bolts in withdrawn or release-d position. Fig. 3, an enlarged detailed fragmentary view of the lower portion of the lock casing illustrating the manner of applying the key for returning the parts of the lock to their locked position. Fig. 4, a perspective view of a key which may be used for unlocking the parts preparatory to returning to locked position. Fig. 5, an enlarged perspectiveview of the inner side of the lock or latch, detached, the parts being in locked position, and the inner spring plate being removed for the purpose of clearer illustration of the parts. Fig. 6,

Specification of Letters Patent.

Application filed December 14, 1912.

. Patented July 22, 1913.

Serial No. 736,698.

a View of the inner side of the same, the parts being shown in unlocked position. Fig. 7, an enlarged vertical sectional view, of the device, applied to a door, the parts being in locked position.

Similar numerals of reference designate like parts throughout all the figures of the drawings.

Among the requiren'i-ents of a lock or latch of this class are the following :-First: That in case of a fire or panic and a rush to the door, the normally locked or stationary door may be readily unlocked by anyone from the inside in a simple and obvious manner, as by pulling down on a latch. Second: That when open it cannot be returned and locked in position except by the janitor or other attendant, such janitor or attendant being provided with a key for releasing the parts in the act of returning the door to its original or initial position.

The improved panic door lock comprises a lock casing or housing 1, adapted to be attached to the inner side of the door. 2, by means of screws 3, the open or inner side of the casing 1, being preferably closed by being mounted upon a subjacent spring plate at, as shown most clearly in Fig. 7, of the drawings.

The improved lock is provided at its top and bottom with slidabl y mounted. vertically movable lock bars 5, adapted to be operated or ejected or retracted by the mechanism hereinafter described, said lock bars being preferably adjustably connected to the lock rods 6, by having the latter threaded into suitable openings in the lock bars 5, and having said lock bars 5, provided with lock nuts 5 The lock rods 6, are connected at their ends with door bolts 7, the latter being slidably mounted in guide or keeper straps 8, and operating in a well known and understood inanner.

As a means for ope "ating or actuating the lock bolts or bars 5, the latter are connected at their ends within the casing 1, by means of pivotally mounted link members 9, said link members 9, being connected at their inner ends by means of a cross lever member 10, the latter being pivotally mounted within the casing 1, by means of a bearing screw 11. By reason of the construction just described, it will be obvious that the connection is such between the bolts 5, thatthe same will be simultaneously actuated or projected and retracted for the purpose of imparting a like motion to the lock rods 6, and door bolts 7.

As a means for operating the mechanism above described, a bolt operating or lever member 12, is pivotally mounted in bearing lugs 1, of the lock casing, said bolt operating member extending through a suitable slot opening 1, in the face side of the lock casing l, and being connected at its inner side to a pair of connecting links 13, connected, in the present instance, to the upper end of the lower lock bar 5.

As a means for holding the bolt operatin member 12, and its connections in open and closed positions, the tip or nose portion 12, of the inner end of said latch member is adapted to press or wipe upon the adjacent spring plate 4, the engaged portion of the latter being adapted to spring inwardly as the bolt operating member 12, is moved to and from its open and closed positions, respectively, and if desired, the subjacent portion of the door 2, may be provided with a recess portion 2 as shown in Fig. 7, of the drawings.

As a means for locking the parts in unlocked position when the door bolts 7, are retracted by the downward depression of the operating member 12, and preventing the return of the parts to their locked position except by an authorized part-y provided with a key, a sliding bolt or detent member 14, is provided, said detent member 14, being adapted to slide in a guide bearing member 15, the latter being surrounded by a. spring 16, which spring 16, actuates the bolt or detent member 14, through the medium of a cotter pin 17. The detent member 14, is provided with a beveled head or nose portion 14 adapted to ride upon the side of the adjacent lock bar 5, and when the latter and its connections are moved to a retracted position as shown in Fig. 6, the beveled or nose portion 14, is adapted to snap into engagement with a notch or recess 5 as shown in Fig. 6, of the drawings.

hen it is desired to release the parts of the lock for the return of t-hebolts to their initial or locked position, a suitable key member, such for example, as the key 18, may be inserted from below upwardly in a key receiving opening 1, in the lower end of the lock casing 1, adjacent to' the lower lock bar 5, said key member being pushed upwardly and being provided with a beveled or wedge shaped nose portion 18 to engage with the correspondingly beveled head or nose portion 14 of the detent member whereby the latter will be retracted from the not-eh or recess 5', of the adjacent lock bar 5, thus permitting the bolt operating member 12, to be elevated in the return of the parts to the position shown in Figs. 1 and 7 of the drawings.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of my invention will be readily understood.

Having thus described one of the embodiments of my invention, what I claim and desire to secure by Letters Patent is,

In a panic bolt, a lock casing, lock bolts slidably mounted in the upper and lower ends thereof, link members pivotally connected to the inner ends of said lock bolts, a rock lever pivotally mounted in said lock casing and having its free end connected to the ends of said link members, a bolt operating member below the pivot of said rock lever and extending from one side, of said lock casing, connecting links carried by the inn-er end of said bolt operating member and pivotally connected to lower of said lock bolts, a spring plate at the back of said lock casing and in contact with the inner end of said bolt operating member whereby the latter is resiliently held in its open and closed positions, and a key releasable spring actuated member adapted to automatically engage with one of said bolts when said bolts are moved to their released positions.

In testimony whereof I have afiixed my signature in presence of two witnesses.

JOHN M. MARTY. lVit-nesses O. C. BILLMAN, E. P. SoHLossER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

